首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
Why Don’t Babies Talk Like Adults? Over the past half-century, scientists ha...
Why Don’t Babies Talk Like Adults? Over the past half-century, scientists ha...
admin
2020-12-24
29
问题
Why Don’t Babies Talk Like Adults?
Over the past half-century, scientists have settled on two reasonable theories related to babytalk. One states that a young chilcTs brain needs time to master language, in the same way that it does to master other abilities such as physical movement. The second theory states that a chilcTs vocabulary level is the key factor According to this theory, some key steps have to occur in a logical sequence before sentence formation occurs. Children^ mathematical knowledge develops in the same way.
In 2007,researchers at Harvard University, who were studying the two theories, found a clever way to test them. More than 20,000 internationally adopted children enter the U. S. each year. Many of them no longer hear their birth language after they arrive, and they must learn English more or less the same way infants do — that is,by listening and by trial and error. International adoptees don’t take classes or use a dictionary when they are learning their new tongue and most of them don’t have a well-developed first language. All of these factors make them an ideal population in which to test these competing hypotheses about how language is learned.
Neuroscientists Jesse Snedeker, Joy Geren and Carissa Shaft。studied the language development of 27 children adopted from China between the ages of two and five years. These children began learning English at an older age than US natives and had more mature brains with which to tackle the task. Even so, just as with American-born infants, their first English sentences consisted of single words and were largely bereft (缺乏的)of function words, word endings and verbs. The adoptees then went through the same stages as typical American_born children, though at a faster clip. The adoptees and native children started combining words in sentences when their vocabulary reached the same sizes, further suggesting that what matters is not how old you are or how mature your brain is, but the number of words you know.
This finding — that having more mature brains did not help the adoptees avoid the todd-ler-talk stage — suggests that babies speak in babytalk not because they have baby brains, but because they have only just started learning and need time to gain enough vocabulary to be able to expand their conversations. Before long, the one-word stage will give way to the two-word stage and so on. Learning how to chat like an adult is a gradual process.
But this potential answer also raises an even older and more difficult question. Adult immigrants who learn a second language rarely achieve the same proficiency in a foreign language as the average child raised as a native speaker. Researchers have long suspected there is a “critical period” for language development, after which it cannot proceed with full success to fluency. Yet we still do not understand this critical period or know why it ends.
When the writer says “critical period”,he means a period when .
选项
A studies produce useful results
B adults need to be taught like children
C immigrants want to learn another language
D language learning takes place effectively
答案
D
解析
最后一段提到 “ Researchers have long suspected there is a ‘ critical period,for language development, after which it cannot proceed with full success to fluency”,说明关键期过了以 后,语言学习就不能很成功地达到流利的程度。由此看出,关键期是语言学习可以有效 发生的时期,所以答案是D。
转载请注明原文地址:https://ti.zuoweng.com/ti/mj9QKKKQ
相关试题推荐
共用题干 第一篇TheMysteryofClonesScientistshaveclonedgoats,cats,cows,pigsand...
共用题干 第一篇TheMysteryofClonesScientistshaveclonedgoats,cats,cows,pigsand...
Mostbabiescantakeinawiderangeoffoodeasily.A.bringB.keepC.serveD.
Newbornbabiescandiscriminatebetweenaman’sandawoman’svoice.A.treatB.
UsingHIVVirustoCureCancer Scientistsareplanningtousehumanimmunode...
UsingHIVVirustoCureCancer Scientistsareplanningtousehumanimmunode...
UsingHIVVirustoCureCancer Scientistsareplanningtousehumanimmunode...
UsingHIVVirustoCureCancer Scientistsareplanningtousehumanimmunode...
Thosescientistsarestudyingonhowtoharnesstheenergyofthewind.()A.creat
CitizenScientists Understandinghownaturerespondstoclimatechangewill...
随机试题
下列关于个人住房贷款的贷款发放条件的表述,错误的是( )。[2013年11月真
胰头癌的首发临床表现是 A.黄疸 B.稀便 C.贫血 D.上腹隐痛 E
现金流量表的现金及现金等价物净增加额应与资产负债表的()相符合。 A.资产
在南方国有林区或者一些少林省,区划一般包括( )。
农村经济基本情况统计中,汇总劳动力数指汇总的( )和半劳动力数之和。 A.
23岁男性患者,2周前突起全身水肿、尿量减少、血尿,近5天来尿量逐渐减少,脸色苍
代表确定的指引作用的法律规范有( )。 A.授权性规范 B.命令性规范
既含蟾酥,又含雄黄的中成药是A.六神丸B.蟾酥丸C.六应丸D.安宫牛黄丸E.牛黄解毒丸
应用华法林抗凝过程中,出现严重出血时,可应用急救的药物的是A:维生素K1B:维生素K3C:维生素K4D:维生素B1E:维生素B12
银行营销人员的销售技能主要是()。A.观察分析能力B.应变能力C.组织协调能力D.沟通能力E.口头表达能力